基于Bullet物理引擎的钢筋混凝土框架结构倒塌模拟  

Collapse Simulation of Reinforced Concrete Frame Structures Based on Bullet Physics Engine

作　　者：王恺祥 吴晓涵[1] 王俊 WANG Kaixiang;WU Xiaohan;WANG Jun(Department of Disaster Mitigation for Structures,Tongji University,Shanghai 200092,China;University of Texas at Austin,America 78705)

机构地区：[1]同济大学结构防灾减灾工程系,上海200092 [2]德州大学奥斯汀分校,美国78705

出　　处：《结构工程师》2023年第3期16-24,共9页Structural Engineers

基　　金：国家自然科学基金项目(51978077)。

摘　　要：地震作用下结构物的倒塌不但会使结构内部的财产遭受损失,而且会使周边道路产生堵塞,影响后续救援人员的进入,甚至危害生命,对社会造成巨大损失。提出了一基于Bullet物理引擎的结构倒塌模拟方法,通过非线性弹簧连接梁、柱、板等刚体单元,用弹簧的破坏来判断相应构件的破坏,从而进行结构的倒塌模拟。并对该方法进行构件上和结构上的验证,最后以一栋八层框架结构为例进行倒塌模拟。结果表明,该方法较为有效,八层混凝土框架结构在地震作用下倒塌后的废墟虽然大部分分布在原结构的周边,但是距离原结构最远可达到20.42 m,会导致相邻建筑的倒塌和周边道路的堵塞,影响后续救援。The collapse of structures under earthquake action not only causes damage to property and life inside the structure,but also causes blockage of surrounding roads due to structural collapse,affecting the entry of subsequent rescue personnel and causing huge losses to society.This paper proposes a structural collapse simulation method based on the Bullet physics engine,which uses nonlinear springs to connect rigid elements such as beams,columns,and plates.The failure of the corresponding components is judged by the failure of the springs,thus conducting structural collapse simulation.The verification of the method carried on both components and structures,and finally the simulation of the collapse of an eight-story frame structure is performed as an example.The results indicate that this method is relatively effective.Although most of the collapsed ruins of an eight-story concrete frame structure under earthquake action are distributed around the original structure,the farthest distance from the original structure can reach 20.42 m,which can cause blockage of surrounding roads and affect subsequent rescue efforts.

关 键 词：离散单元法 倒塌模拟 物理引擎 结构抗震 废墟场景 

分 类 号：TU375.4[建筑科学—结构工程] TU312.3